BU94501AMUV Datasheet, PDF (33/73 Pages) Rohm – AAC/WMA/MP3 +SD Memory Card + iPod

BU9450xAxxx series
Datasheet
12. Playing files
12.1 Function
For the files judged to be playable through the file search function, the LSI automatically switches the decoder
using the file extension and decodes these files.
Fast forward play and rewinding play operations are available.
Also, repeat play and random play are available.
12.2 Playable file formats
12.2.1 MP3 file format
This format supports MPEG Audio 1, 2, 2.5 and Layer 1, 2, 3.
It supports sample rates of 8 kHz, 16 kHz, 32 kHz, 11.025 kHz, 22.05 kHz, 44.1 kHz, 12 kHz, 24 kHz and 48kHz.
It supports bit rates of 8 to 320kbps and VBR (Variable Bit Rate).
12.2.2 WMA file format
This format supports WMA Ver.9 Standard.
It supports sample rates of 8 kHz, 16 kHz, 32 kHz, 11.025 kHz , 22.05 kHz, 44.1 kHz and 48 kHz.
It supports bit rates of 5 to 384kbps and VBR (Variable Bit Rate).
It does not support DRM.
It supports ASF files including audio streams only.
12.2.3 AAC file format
This format supports MPEG4 AAC-LC.
It conforms to ITunes and 3GPP TS 26.244.
It supports file types of m4a, mp42 and 3gpX. (X is an arbitrary numeric value.)
ITunes is validated in the following versions: 4.*, 5.*, 6.* and 7.0-7.5.
It supports sample rates of 8 kHz, 16 kHz, 32 kHz, 11.025 kHz, 22.05 kHz, 44.1 kHz, 12 kHz, 24 kHz and 48
kHz.
It supports bit rates of 8 to 320kbps and VBR (Variable Bit Rate).
It does not support DRM.
12.2.4 WAV file format
This format supports RIFF WAVE.
It supports sample rates of 8 kHz, 16 kHz, 32 kHz, 11.025 kHz, 22.05 kHz, 44.1 kHz, 12 kHz, 24 kHz and 48k
Hz.
If you try to play a file created in any format other than above, the LSI immediately terminates decoding it.
12.3 Playing files having damaged data
If the data section of the MP3 file is damaged, the LSI plays the music data in the possible range instead of
ceasing to play the entire file. It mutes the unplayable section. However, AMUTE terminal remains H output.
If the data section of the WAV file is damaged, noises are output.
The LSI executes other files within the playable range and stops playing. Then, it skips to the next tune.
If a part of the data header is damaged, the LSI immediately terminates playing and skips to the next tune.
If the file’s extension is playable but its file’s data does not have a format supporting to the extension, the LSI
immediately terminates playing and skips to the next tune.
If the file does not have a file format, the LSI immediately terminates playing and skips to the next tune.
However, when the file data is structured in a format other than MP3 and its file extension is *.MP3, *.MP2 or
*.MP1, the LSI plays it in the silence mode basically. However, if the LSI can read any playable data, it plays the
file partially.
In this case, the time information which is output as the serial status also becomes unstable. The time information
is then partially output but you cannot obtain the correct information.
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TSZ02201-0V2V0E600070-1-2
2012.12.10 Rev.003